Method of making seamless tubes rich in zinc



.I1-.ine l2, 1923. 1458505 W. l... WOODWARD METHOD 0F MAKING sEAMLEss TUBES RICH 1N ZINC Filed Feb. 2l, 1921 Wr W2 5, l

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L a L. WOODWD, 0F LAKEWOOB, 0R10.

METHOD OF MAKING SEAMLESS TUBES RICH EN Application led February 21, 1921. Serial No. @36,649.

To all whom it'may concern.'

Be it known that I, WILLIAM L. WoonwAnc, a citizen of the United States, residing at Lakewood, in the county of Cuyahoga and State' of Ohio, have invented a certam new and useful im rovement in Methods of Making' Seamless ubes Rich in Zinc, or which the following is a full clear, and exact description, reference being had to the accompanying drawings.

This invention relates to a lnovel method for making seamless tubes of zinc or of an alloy rich in zinc.

The object of the invention is to provide a cheap and simple method of producing seamless tubes of the composition mentioned which shall possess ductility and malleability so that the saidy tubes can' be drawn, bent, swaged or otherwise manipulated as desired.

Vl ith this object in view the invention consists in the steps hereinafter explained in detail and set forth in the appended claims.

In the drawings I have diagrammatically outlined the steps of my process and in which Fig. 1 is a longitudinal and a transverse cross section of a tubular body in the first stage of fabrication; Fi 2 is a similar view indicating the secon stageor step; Fig. 3 is a longitudinal and a cross sectional View of the iinished tube and Figs. 4 and 5 are longitudinal sectional views of tubes drawn from the finished tube indicated in Fig..3.

In carrying out my invention I provide a seamlem tubular body A preferably'of zinc 0r of an alloy or compound rich in zinc.

' This seamless' tubular body A may be made by casting in any suitable manner or it can be produced by extrusion or said seamless tubular body'can be produced by casting a solid ingot and then boring the same.`

rlhis seamless tubular body of zinc or a compound richin zinc possesses a well defined crystalline structure or formation and in carrying out my im roved method this crystalline structure or ormation is broken up or the molecularv structure of the seamless tubular body is transformed so as to render `the same ductile and malleable. This change or transformation I propose to make by mechanically treating the crystalline tubular body and it will be understood that there are a variety of such mechanical treatments such as hammering, rolling and swaging and in the drawing I have shown the crystalline tubular body A placed upon what I claim is:

a suitable mandrel B and subjected to the action of a hammer C, this mechanical treatment' in the form of hammering, serving to completely change the molecular formation-so that the crystalline formation is completely broken up and the tubular body as a Whole rendered ductile and malleable and in Fig. 3 Ifhaveindicated diagrammatically the tubular body D in which such transformation or change hastalren place. The crystalline tubular body having been transformed into a ductile and malleable tubular body can be readily drawn after the well known methods and in Figs. 4 and 5 ll. have shown the tube illustrated in F ig. 3 in successive steps of drawing. A seamless tube made in accordance with the above method can be drawn or bent and can be treated, utilized or fabricated in any manner in whichany seamless tube possessing ductility and malleability can be utilized and treated.

The method'above described has the advantage of simplicity and cheapness and at the same time provldes a seamless tube of exceptional merit.

t will thus be seen that I provide a simple and highly eflcient method by means of which a seamless'tube of material rich in zinc and possessin ductility and malleability can be providex Having thus described my 1. The herein described method of making seamless tubes of material rich in zinc which consists in first producinga crystalline tubular body of a material rich in zinc and then mechanically treating said tubular body 4to break u the crystalline structure thereof and ren er said tubular body ductile and malleable. f

2. The method of making seamless tubes of the kind described, which consists in providing a tubular body of a material rich in zinc and of crystalline structure, and then mechanically changingvthe molecular structure of said tubular body and renderingv the same malleable and ductile.

3. The method of making seamless tubes of the kind described, which, consists in making a tube rich in zinc and a crystalline structure, then mechanically treatlng said invention,

tube to transform the molecular, structure v of the kind described, which consists in first forming a crystalline tubular body rich in providing a seamless zinc tube of crystalline zinc into one possessing the properties of l0 structure and then mechanically treating ductility and malleability. which consists in said tube to break up the crystalline ormamechanically treating said tubular body to tion and produce a seamless zinc tube, the effect a rearrangement of the molecules.

molecular structure of which possesses the In testimony whereof, I hereunto aiix my qualities of ductility and malleability. signature. l

5, The herein described method of transf WILLIAM L. WOODWARD. 

